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Controlled Entry - One Way Traffic:
"Controlled entry, One Way Traffic" is also a popular setup for automated gates.  This system is popular for one way traffic and higher security areas as 'free exit' is not integrated into the system.  Vehicles may enter in one direction only.  Loops serve as safety devices.

System Consists of: System Sequence
1 - Operator (single or dual application)
1 - Time Delay (included with the purchase of an Linear/OSCOŽ gate operator.)
2 - Loops
1 - Vehicle Detectors
1 - Entrance Device, i.e. keypad, card reader
1 - Three button Switch (included with the purchase of an Linear/OSCOŽ gate operator.)

*Note: Other entrance devices may be used, i.e. radio controls, telephone intercoms, etc..

The vehicle approaches the entrance and driver uses the entrance device, i.e. keypad, card reader, radio device.  This creates an impulse which actuates the operator and opens the gate.

As the vehicle travels through the opening, it passes over the "outer loop" and "inner loop" creating an impulse to hold the gate open.  When the loops have been cleared, the timer, after a preset period, sends an impulse to the gate operator to close the gate.

If the gate is closing as a vehicle reaches the loop area, the gate reverses to the open position and the timer automatically resets.

*Hoover Fence Co. Recommends Safety Devices On All Automated Gates.